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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* .dialog {
            width: 100%;
            height: 40px;
            background: skyblue;
            line-height: 40px;
            padding: 0 20px;
            margin: 10px 0;
        }

        .dialog b {
            float: right;
        } */

        button {
            width: 40%;
            height: 40px;
        }
    </style>
</head>

<body>
    <button>1</button>
    <button>2</button>
    <button>3</button>
    <button>4</button>

    <!-- <div class="dialog">
        <span>我是消息框</span>
        <b>X</b>
    </div>
    <div class="dialog">
        <span>我是消息框</span>
        <b>X</b>
    </div>
    <div class="dialog">
        <span>我是消息框</span>
        <b>X</b>
    </div>

    <div class="dialog">
        <span>我是消息框</span>
        <b>X</b>
    </div> -->

    <script src="./lib/require.js" data-main="main"></script>
</body>

</html>